Pulses can be constituted-of-or-filled-with (microwave radiation).
Hundreds can be constituted-of-or-filled-with (microwave background experiments).
A (microwave radio region) may pertain-to an electromagnetic spectrum.
(Microwave radiation emissions) may emanate from reaches of the atmosphere.
A male may make contributions to an origin of (microwave background radiation).
Contributions can be to an origin of (microwave background radiation).
A (microwave cavity) can be constituted-of-or-filled-with dimensions.
(Precision measurements) may pertain-to a cosmic (microwave background).